<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../js/vue.js"></script>
</head>
<body>
    <div id="app">
        <p> input 元素:  </p>
        <input type="text" v-model="msg" placeholder="请输入..."></input>
        <p>消息是: {{msg}}</p>
    </div>
<script>
    new Vue({
        el:"#app",
        data:{
            msg:"hello world"
        }
    })
</script>
</body>
</html>